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    <title>Document</title>
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<body>
    <script>
        // 因数的个数
        var yinshu = 0 ;
        var num = prompt("输入数字");
        for (var i = 1 ; i <= num ; i++) {
            if (num % i == 0) {
                console.log(i);
                yinshu++;
            }
        }
        alert(yinshu);
    </script>
</body>
</html>